Do not expect vomiting, expect bleeding from the gums, nose, or rectum.
Rodenticide is a powerful blood thinner and it destroys the clotting ability of the blood.
Internal bleeding in the lungs will produce a cough that will not go away. That may be your first sign. PAY ATTENTION.
The often missed tell: NEON GREEN STOOL usually indicates that there has been rodenticide ingestion.PLEASE do not wait to act. In some dogs it can take up to a week for other symptoms to appear. ACT FAST, the key is to get immediate treatment as soon as you see a neon green stool. Neon green is the color of the rodenticide pellets.
It is catastrophic vicious cycle that has been created with targeted victims [rodents ] that are getting more resistant to the poisons commonly used. Pest control manufacturers that are using more and more potent compounds and poisons than ever before. And for the bait to be attractive... the poison must not be detectable, so it is generally coated with palatable incentives like molasses, brown sugar and peanut butter.Things that taste good.
Unintended victims are cats, dogs, owls and any other creature that happens to eat the poison or eat the poisoned rodent.
Immediate treatment is the key to better survival rate.
Teach your dog to be a picky eater. Teach them the "Leave it" command. Food should only come from you. Reward them for turning down anything they can find on their own or anything that is given to them by 3rd parties.