On the contrary: the sweet treat can cause health problems or even be fatal, as chocolate is poisonous for dogs and cats.
It is better to spoil your four-legged friend with high-quality dog and cat treats. There are entire theme worlds in specialist shops with suitable and healthy "declarations of love" for your pet.
Another nice gesture: instead of giving your own pets the umpteenth toy, give the gift of affection and care for homeless animals. With the SUST's virtual food bowls, this is very direct, simple and uncomplicated: