First of all you should know the size of your pet and then buy the toy accordingly. If you pick a size that does not fit your pet, it might not like the toy at all, or sometimes they can feel even intimidated and stay at distance from them instead of playing. So just try to pick a toy of right size for your pet.
Second, you should think of the material that the toy is made of and make sure it is not harmful for your pet. Do not buy a toy made of degradable plastic or any other such material. Also, make sure that toy is not made of a material that can be quickly ripped apart by your pet, especially if it is a dog. Be careful in choosing the material the plush toys are made of. Generally, the toys are made of a wool fabric and stuffed inside are good for your pet.
Make sure you also consider the safety aspect of your pet before buying the toy. Do not buy toy that has anything sharp attached to it. It can hurt your pet. Again, buying something made of wool cloth and stuffed will be helpful. This can keep your pet safe from any harmful risk.
It is better to buy a toy for your pet, which is very similar to your pet. For example, a dog might like more to play with a stuffed dog, while the cat can be scared of it. So selection of a right toy also helps your pet to get entertained better. The animals can also take the toy as a companion if the toy is similar to them.
You can buy the toys from pet shops. Or else, you can search about them online and purchase form auction sites. However, buying toy from shops is a better approach, because you can practically see the toy before buying. It is also safe in case of making payments. If you are a regular visitor to your local pet shop, this can help you source a good toy for your pet.
It is better to monitor your pet while playing with the toy initially for some time. This can help you know the liking and disliking level of your pet with the toy, see if the animal is injured or else the toy itself is ripped apart by you aggressive pet. It is possible that the toy is torn after some time, you can either repair it or buy a new one for your pet. Do not let your pet miss on the routine entertainment activity, it is good for their health, as much as it is for the entertainment for you and the animal.