I don't think there's a painless way. In all advanced organisms, the body alerts the brain when things aren't right. The signal used is frequently pain, and apparently always discomfort. Sadly, I am not aware of any pleasant way to do this.
On the other hand, modern approaches that use anticoagulants are not as painful as earlier methods, for instance, involving strychnine.
The reason why rat poison works so well is because rats cannot vomit, and such the poison cannot be expelled. My suggestion, if it is a pet rat, don't let it get near rat poison in the first place and make sure you have a vet who is willing to care for a rat, and give them a call.
A little more...Modern anticoagulant rodenticides interfere with the body recycling Vitamin K, so once basic resources are exhausted, clotting stops. Vitamin K works in rat and human overdoses to reactivate clotting.I am not able to find any data that show dosage or administration techniques for a poisoned rat, so you'll have to work with your vet on this. Note also the website reference.
I take it the chicken (not you) ate the rat poison? The short answer is how much was ingested compared to body weight and type of poison. Take the container of poison showing it's ingredients along with the animal to the Vet immediately. Speed is essential and you're going to have a very expensive chicken if it survives.
Call your local poison control and/or the maker of the poison for their expert advice.
get it to a vet
To kill the pigeons with rat poison, you will have to poison their food with the rat poison. You can poison the water that the pigeons drink and the cereals that the pigeons eat.
Black rat poison.
There is no rat poison in toothpaste. Never.
Barium is used for rat poison.
No, it could not, because the poison was specifically designed to kill rats, and was developed as a rat poison/killer, not a human poison/killer. It would still be considered rat poison, even if the human died from the rat poison.
Well this will vary by the brand and type of rat poison, generly not much. Hence the name 'rat poison'. If your rat has eaten rat poison i would advise that you take them to the vet emedietly.
Rat Poison
yes
Rat poison IS coumadin.
Rat traps or rat poison :-)
Modern rat poison is an anticoagulant, not arsenic. This is much safer!
YES! If a child ingests rat poison, take them to the hospital immediately!