Last night Kallie started with this coughing sound. She's done it before when she ate something she didn't like it sounded like she was trying to cough it back it up, but last night she didn't have anything new. They only thing different we did to her was we put a new kind of flea medicine on her. She coughed through the night last night and this morning when we woke up she started again. I don't know if she's coming down with a cold or if there is anything we can get at the pet store to stop her coughing since we might have caught it soon or do we need to take her to the vet? Can you help?