this is weird! it just started maybe yesterday or day before. i'm changing his diaper and smell a hint of mothballs. we don't have any mothballs on the premises. he is 29 mos old and still nursing, though i'm pregnant and now producing colostrum. diet has not changed - mine or his. we are vegetarian, but we are not vegan. he's pooping more loosely now that the colostrum is in, but otherwise, things "look" normal. he seems healthy and happy as usual. any ideas?