Make sure you gather any remaining ant poison boxes up and dispose of them properly. You cannot use ant bait, roach motel type insecticides, or D-con mouse poison boxes when you have pups like ours around! They are too curious.
I would get the number of Poison Control:
ASPCA | Animal Poison Control Center near your phone. (888) 426-4435 They MAY charge you a $65 fee. Still better to get expert info any time of day or night! I would also get the # to the nearest 24-hour emergency vet clinic nearest you. They may answer some question over the phone for free or they might just say to bring them in -- still better safe than sorry.