Hey! where in Canada are you? The sneezing is probably allergies and so is the coughing. However if it continues you might want to go to the vet and make sure it isn't kennel cough- which sounds kinda like a hack... it reminds me of right before they throw up and kinda like a goose honking
anways. Children's Liquid Dye Free Benedryl. Layla is 6 lbs and I give her 1 ml. You could probably give her 1/2 a ml. See if you can go to a drug store and get a pharmacist to give you an eye dropper with measurements on it. That's where i got mine. It was free- I got it at a Shopper Drug Mart. Also keep in mind it might knock her RIGHT out and she will be very sleepy.