Too much food, not enough exercise, too many sunflower seeds or junk food.
Solution? Feed only what your mouse will eat in 30 minutes, add a wheel, & feed them more veggies & fruit.
9 of the 10 fat-tailed mouse opossums (not the Paraguayan Fat-Tailed Mouse Opossum), the Fat-Tailed Dunnart, the Fat-Tailed False Antechinus, and 4 of the 5 pygmy possums (not the Mountain Pygmy Possum) are mouse-like marsupials that store fat in their tails.
That depends how fat the mouse is. lol.
If your mouse is getting fat and is starting to nest that means she is pregnant. and is getting ready for her babies.
fat chubby hairy
If your mouse is too fat, than it's either pregnant, has too much fat in the diet (sunflower, safflower & linseeds will make them fat, along with nuts) or there's a genetic problem that is causing them to be fat (like lethal yellow).
You shouldn't feed pizza to a mouse, it has a lot of fat in it and it can make it sick.
it depends how fat they are
Mouse House.Mouse house, or rat flat.If you mean what is a hink pink for a home for a rodent, it is "rat flat" or "mouse house".
a nasty little robent called a rat or mouse
I have the same problem and I found out that my fat mouse wasn't actually a female and it was a male. My thin mouse is a female, and female mice don't eat as much anyway. Plus mice usally deficate when they are scared.
it eats dinosours mouse and your big fat poo
Give it lots of affection by spending time with it and give it lots of yummy veggies. But make sure not TO much or your mouse will get fat.