I'm curious what the collective thinking is re: why they are so prone to tumors.
Some years ago, when I was caring for birds in another coop at another location nearby, rats moved in. At first I used hav-a-hart traps to try to get them out and one morning found a youngster in the trap, which had been supplied with food and nothing else. When I found the little one, it was all cuddled in a straw nest in the trap. I don't think this could have happened without adults feeding straw into the trap for the youngster. Kind of broke my heart. I didn't harm any of them but did make a fortress of the coop with lots of hardware cloth so none could gain entry again. Call me a criminal but I did move the ones caught to another location, nowhere near homes. I was torn, knowing this isn't the best habitat management but unable/unwilling to kill them. Feel like I broke up families but didn't have a better idea.
A couple of days ago I found another one in a more recent coop location and I did the same thing but have caught no others since, nor do I see any evidence of them at all (no poop, no food taken...)...I think she got in through a dug hole that I now have blocked with lots of wire. But I feel bad for her, as she is now separated from whoever she knew before. Unharmed, but alone. Ugh - no easy answers.
JJ
Domesticated rats were origina;;y in the USA from lab rats, Pet rats in Europe (where pet rats started) were from captured wild rats that had pretty patterns.
Lab rats are bread to have tumors or illness so that drug test can be done on them.
Now US domestic rats are 100s of generations removed from the lab rats (usually) BUT ALL of the original stock had the propensity for tumors.
It would be like having a new breed chicken that is used for ...fishing feathers... because as soon as the hormones change the chicken loses all of its feathers in a special spot (a nest for instance), then feeling sorry for a couple of these featherless and taking them home and breeding - the resulting generations (if no lethal genes are present) even if at some later point mixed back with normal chickens would still heavily carry 'lose the feathers' and a 'molt in nest' trait.
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ok, I have 3 pet rats and a wild rats in my attic problem, couldn't catch a thing- bait was missing, trap was tripped no rat- so I sterilized the tap and put one of my boys in it (in the bottom of my cage)- it took four hours the first time for the others to release him- and the trap, like in the attic was empty of bait...
Rats are altruistic :
http://www.sciencedaily.com/releases/2007/07/070703173345.htm (ok not the best study but it mirrored a peer reviewed one that is for subscribers of that magazine only.)