Is this mouse pregnant or just plain fat and lazy?

[dagger]

I bought a new mouse to renew my interest in mice about 4 weeks ago.
Initially she was a happy vibrant little thing in her new home but she
has grown larger and larger and has become more dormant just sitting in
ner nest; she's now too fat to even run on the wheel properly! I've read
that the gestation period in mice is approx. 21 days, but I am now fast
approaching having her for four weeks with no sign of a litter. One
would think she would certianly have given birth to her litter by now if
she was impregnated at the pet shop.

I purchased a breeding female from the petshop to assist with the litter
and as a companion about a week after I thought that she was pregnant,
she is happy as ever.

What is the best way to tell if a mouse is pregnant? Should I take her
to a vet?

Many thanks,

dagger

[Either Chloe or Liam]

Post by dagger
I bought a new mouse to renew my interest in mice about 4 weeks ago.
Initially she was a happy vibrant little thing in her new home but she
has grown larger and larger and has become more dormant just sitting in
ner nest; she's now too fat to even run on the wheel properly! I've
read that the gestation period in mice is approx. 21 days, but I am now
fast approaching having her for four weeks with no sign of a litter.
One would think she would certianly have given birth to her litter by
now if she was impregnated at the pet shop.
I purchased a breeding female from the petshop to assist with the
litter and as a companion about a week after I thought that she was
pregnant, she is happy as ever.
What is the best way to tell if a mouse is pregnant? Should I take her
to a vet?
Many thanks,
dagger

Sometimes mice probably would have a litter later then normal but
If she can't run on the wheel, I hardly think she is pregnant because mice
will still run on the wheel when pregnant.

Chloe <:3>>---

[Either Chloe or Liam]

Post by dagger
I bought a new mouse to renew my interest in mice about 4 weeks ago.
Initially she was a happy vibrant little thing in her new home but she
has grown larger and larger and has become more dormant just sitting in
ner nest; she's now too fat to even run on the wheel properly! I've
read that the gestation period in mice is approx. 21 days, but I am now
fast approaching having her for four weeks with no sign of a litter.
One would think she would certianly have given birth to her litter by
now if she was impregnated at the pet shop.
I purchased a breeding female from the petshop to assist with the
litter and as a companion about a week after I thought that she was
pregnant, she is happy as ever.
What is the best way to tell if a mouse is pregnant? Should I take her
to a vet?
Many thanks,
dagger

Sorry to dishearten you, but it sounds like a tumour to me. Better get it
checked out right away. If it is a tumour, then I'm afraid there is
little you can do but give her a happy life while she still has one.

Of course, she may (like you say) be pregnant and just be holding on to
the little ones for a long time, but I don't think it's likely. Like
Chloe (my sister) says, pregnant mice can usually still run on wheels.

Liam

[Flykiller]

Post by dagger
What is the best way to tell if a mouse is pregnant? Should I take her
to a vet?

some mice just get impossibly fat. it's genetic.

if she is pregnant, look at her sides. you'll see the outlined shapes of the
babies inside of her, and you'll see them squirming. (imagine trying to sleep
like that.)

call around and see if you have a vet that will deal with mice, and ask him for
advice.

[Heather M. Fieldhouse]

I recently read about a mouse who had to be given a C-section because a
hormonal condition had prevented her from going into labor when she should
have. As a result, the babies had died inside the mother mouse and had to be
removed.

Here's the article. It's on the Finnish Show and Pet Mice web site.

http://koti.mbnet.fi/haisulit/engp/bpcsection.html


Heather

[Watcher]

Mice are very prone to obesity -- often, they are used for obesity research.
The stock in petshops is also very poorly-bred, and so genetic faults will
show up more readily. This may be expressed in ways like a higher
propensity for tumours or obesity. Often, with a tumour, there will be an
un-evenness to the mouse's outline -- like a 'bulge' in one area more than
in others, on a fat mouse. Sorry, but not much can be done for that. I've
had to euthanize two girls with tumours, because it makes them very unhappy
little critters (understandably). Just keep her comfortable, and help her
out gently when the time comes. Also, people on this NG with far more
experience in diet formulation than me can probably advise you on the best
thing to feed mice for really good health -- but a good diet includes lots
of variety, not just store-bought seed mixes. Maybe something is lacking in
the diet that would make her feel better?

BTW, we have two girls, both from the same litter -- one is the size of a
baby rat (a BIG mouse, and not very thin, either), and the other one is a
little tiny thing. They really are all very individual.

Still -- maybe you'll soon be the proud owner of a bunch of lovely little
babies!

Best of luck to you and the little girl,

Y.

Lucat bene si ergo
Fortibus es inaero
O nobil demis trux
Sum es causen summit dux
-- Anon

Post by dagger
I bought a new mouse to renew my interest in mice about 4 weeks ago.
Initially she was a happy vibrant little thing in her new home but she
has grown larger and larger and has become more dormant just sitting in
ner nest; she's now too fat to even run on the wheel properly! I've read
that the gestation period in mice is approx. 21 days, but I am now fast
approaching having her for four weeks with no sign of a litter. One
would think she would certianly have given birth to her litter by now if
she was impregnated at the pet shop.
I purchased a breeding female from the petshop to assist with the litter
and as a companion about a week after I thought that she was pregnant,
she is happy as ever.
What is the best way to tell if a mouse is pregnant? Should I take her
to a vet?
Many thanks,
dagger