Open to all ideas and suggestions. Foster kittens arrived at four weeks and spontaneously at ten weeks one started obsessive blanket nursing. It was always at night but very self soothing and not easily distracted by human touch, toys, or even food. He had a preferred blanket but any soft material would work. Nursing would go on for 15-20 straight. Now, a week later his sibling has started it too. Third sibling has been placed and started the same behavior as well in his new home around the same time as these two but the nursing for kitten one began before the placement.
No change in environment, food, other animals, etc. Both are pretty confident and independent. They seek out the blanket next to me so perhaps I’m bringing some comfort but not enough? I’ve just never had this happen with a foster and then late appearance makes no sense.