Beautiful kittens now aged nearly 13 weeks. We got them right after their first lot of vaccinations at 9 weeks and 1 day. We got them from a friend and I was lucky enough to be there the day they were born.
So we've had them for about 3 weeks and in the past week the one male kitten is attempting to suckle off the other cat. His brother doesn't seem to mind that much and just lies there occasionally batting him on the ear in a half-hearted way. Meanwhile the other brother suckles away on his fur generally in the "teat" area . He does all the pawing stuff too. They do all the play-fighting, groom each other and are very good in the litter department and are affectionate towards us and will sit on our laps.
If I didn't know the circumstances I would suggest that the one that is suckling is younger than the other one and was removed too soon from the mother. But they are the same age and had finished weaning. My partner says he has seen the "younger" acting one looking like he is attempting to mate with his brother too.
Should I be worried or is this all fine and dandy cat-like behaviour? They are booked in for the snip at the age of 16 weeks.