Maybe the poison control number might help. I had a friend who rescued a fawn and had it in her house. The fawn hadn't pooped so she gave it a little x-lax. I got there to see the fawn after she gave it the lax. I walked in to see a fawn go streaking thru the rooms with my friend running right behind it
waving a couple rolls of paper towels and a wet washcloth and poo was flying out of the fawn all over the place. What a mess! Funny for me, not for her. The fawn was fine after everything was out. I just checked a tube I have and there is no mention of overdose or anything - just keep away from children, which is on everything. There is a number on the tube to call with any questions. Maybe that would help. I have Hartz Advanced Care Hairball Remedy - 800-275-1414 (9 - 5 EST). Good luck. I hope your babies are ok. AND you are not a bad Mommy. You are a great Mommy with inquisitive little babies.