A few times I have noticed my rat Oreo tugging on my other rat Jett. Once it was his skin on his shoulder and yesterday it was his tail... Jett doesn't seem to care really, he seems to ignore it, like its just his little brother being a little brother. I have four rats, and Oreo could do it to all of them, but I only see him do it to Jett. Is that all it is? Him just being an attention grabbing sibling? Im not sure if they are blood related, I got these specific two off craigslist from a girl who needed a good home for them she said they were bought at the same time at a young age from the same place that's all I know.

Are they all the same type of rats like brown or white? I know that the brown rats I have seen are more aggressive especially toward white rats. As long as its not mean and hurtful it is probably just playful. Keep an eye on them.

This may help
Rampant Ratz - Eva's Rat Aggression Scale (http://rampantratz.proboards.com/index.cgi?board=behavior&action=display&thread=38)

Are they all the same type of rats like brown or white? I know that the brown rats I have seen are more aggressive especially toward white rats. As long as its not mean and hurtful it is probably just playful. Keep an eye on them.

This may help
Rampant Ratz - Eva's Rat Aggression Scale (http://rampantratz.proboards.com/index.cgi?board=behavior&action=display&thread=38)

Ones all black and ones a hooded...