can chinchillas be obese, like to the point where it is dangerous to their health? about 6 months ago i adopted 2 chinchillas from a woman who could no longer give them the attention they need. these two chinchillas are HUGE! they weigh 1lb 11 ounces and 1 lb 14 ounces, and all of the woman's chins were big like them. i was curious so i weighed all my others and the heaviest one was 1 lb 5 oz. a difference of 6-9 ounces in a chinchilla is about a third of their weight so that is a big deal to me.
i kind of think it is not genetic because she had 4 different families going and i have 6 so it would be a really big coincidence for it to be genetic that all hers were big and all mine are small. i don't know if it is diet either because i feed them all pretty much the same thing, free feed the pellets and everyone gets the same number of treats, but they haven't lost any weight since i got them and they don't seem to eat many more pellets than their friends (they have their own cage) they also have a wheel in their cage so they are able to run to their hearts content if they want.
i'm just concerned that it is unhealthy for them, you see all those dog and cat food commercials that warn that being a few pounds overweight can shorten their lives, i certainly don't want that to be the case here. is it normal for there to be that much of a difference in size?