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New Fancy mouse colony, Pic heavy

I have to agree that the enclosure is too small for mice to honestly be stimulated enough. I understand not waning to use up a ton of space for breeders, but a certain amount is necessary. I realize they're in something bigger now, though it still seems crowded to me.

Mice are high energy animals and while it can be hard to determine how much stress they're honestly experiencing because of space constraints it stands to reason that they need a bigger space than what you had them in.

I'm curious, when you raised them in a shoebox sized container did you observe them enough to be able to fairly judge their behavior? Because I've seen mice (2-5 per container) raised in shoebox sized containers virtually their whole life and they do show signs of stress and what I can only assume is insanity.

I've seen them fight, not always drawing blood but fighting is fighting. Chunks taken out of ears where common, as well as infected bites to the face.

Circling was another problems. Just running in a circle, kind of like chasing their tails. But just going and going and going.

Obsessive chewing was another problem, but that's hard to tell if that was because of a lack of any type of chew or not.

And of course, cannibalism. Of babies and adults. Though to be fair with pinkies it could have just been an overly disturbed or bad mother mouse.

I think a wheel would be appreciated, even if you don't witness them use it during the day time and if one buries it doesn't mean other mice don't want to use it. Hamsters have been known to run 8 miles in a single night on a wheel! I imagine mice are similar. Maybe a different kind of wheel would be better, too. :)

They are so goshdarn adorable. I've been considering getting mice lately.
 
I never noticed any odd behavor in the shoe boxes, the only canablism occured because of water bottle issues. But then I have a 6 year old daughter who is rodent crazy, she holds pretty much every single mouse born in my house. So they are social, and very tame lol!

My big tank is still producing, a lot of the girls are on 2nd-3rd litter, so I'll be keeping some of the new female babies and culling some of my breeding does. I do have 12 snakes too feed now lol!
 
Aaaaah 12 snakes! That does warrant a colony hah.

Well, I hope these guys do well in their enclosure. Taking them out does help.
 
I keep my mice colonized throughout the whole process. I find dad helps with the rearing and the moms just pile all the babies in one place and take care of them communally. I have only had one canabalistic female, who of course was culled and fed off.

Right now I have a colony of 1.7 in a 33 gal tank, but hubby is in the process of building me a mouse colony rack that will be 5 tubs high. Floor space wise, the tubs are huge, so the colony will be built to 1.10, and I'll have 2 colonies and 3 grow tubs.
 
Sorta thinking about a colony honestly :p. I feed f/t, so how would I kill them for a fresh killed? Also, my girl eats hops and how long does it take for them to get to be about hopper sized?
 
hopper about 2.5-3 weeks.

killing them for fresh feeding is either CO2 euthanization or cervical dislocation (breaking of neck) which can be done by "bonking" thier neck on the corner of a counter or putting a pencil over thier neck and pulling up hard on the back legs.
 
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