my maltese had this with her last litter, and it was the most scareiest thing i ever had to witness, she shook, she had seisures, she had a bad fever, she could not stand on her own, we got her into the vet, he had to give her 3 shots of calicium before she snapped out of it, he then had to give us iron supplements, and she could not feed her babies after that because it would have killed her.........................so please a vet as soon as possible! please keep us posted