my 6 month old boy Mason is being introed to my 5 girls, buuuut we're having problems. 2 girls up and bit him during what seemed to be a good session (prior to the biting). it would actually help to have a bit of a background of the girls (and Mason!)
3 are girls who are between the ages of 8 - 9 months (all should be from the same litter, were not 100% sure of the age on adoption), not likely to be older. Mason, the boy, is the baby of one of those girls (2 of the girls were pregnant when they came home with us. we had no idea until 1 week later, 2 litters. ended up with 15 rats instead of 3 lol). the last 2 girls are the daughters of the other mom in the group.
so I started out with moving his cage into their room and placing it next to theirs for a week. no aggression, so I started neutral area intros. this went well, even one of the girls who would later bite him snuggled with him in a hammock. so after a week or so of this, I tried a non-neutral area. this didn't go well as somehow a cage door got left open and a girl did not take well to him making a break for the cage. so I scaled it back to a neutral play area for a bit.
again, the neutral area intros went well so I tried the shared area again the other night. this...did not go well. there was absolutely no puffing, hissing, tail wagging, etc. but Mini (mother of the 2 girls I kept) just walked up to Mason and bit him on the back (luckily no puncture wound. just a scrape). she had sniffed him earlier and been fine with him.
the next one is potentially more complicated. Blue had a spay a month ago due to a uterine infection/abnormality. when she healed up I started intros with Mason, at the time thinking I might move her in with him. so she's actually been ok with him and able to be in a cage with him for about 3 weeks. but last night while playing, she started power grooming him and it resulted in a bite on the loose skin behind his shoulder (on his side). luckily again, it appears to just be a bad surface scratch (no puncture mark). but it surprised me. Blue is definitely either the alpha or a beta trying to be an alpha, but she's all ready played the dominance card with Mason and he happily allows himself to be the omega. he's very, very submissive.
to note, after reading this thread, Blue power grooms by going above the other rats. she grooms on the neck/back. she does this on all the other girls, with no issue. so I am not sure if Mason stayed still for a bit and then tried to get out from under her before she was done or what. she's never been aggressive with the other girls to cause harm. whether it be scratching or a bite. Mason is the first bite.
so at this point, I am a bit puzzled as what to do. I'm starting from the beginning. I've moved Mason's cage out of the room until he's healed. I figured I'd start from the beginning once he's healed. is that the right move?
what other tricks are there for rats that are biting?
phew. I really hope this long rambling post makes sense lol. it's late, but I wanted to post my situation hehe.