The 4 week old kitten my family found in a empty parking lot in late May is now 12 weeks old, and still wool sucking. Twice a day she cuddles into my husband's arm, grabs a piece of his shirt and sucks/claws until she falls asleep. The vet says she is fine and will grow out of the habit but I'm a little concerned with her ingesting detergent/fabric softener from his clothing. Should I be worried or seek a 2nd opinion?