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.
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.
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.
Yes, rat poison can kill squirrels if they consume it.
Yes, rat poison can kill squirrels if they ingest it.
Squirrels may eat rat poison, but it is not recommended as it can harm them.
Rat poison IS coumadin.
Rat Poison
yes
Rat traps or rat poison :-)
Modern rat poison is an anticoagulant, not arsenic. This is much safer!