Yes, but you can not feed the ones that were on your tomato plants to your animals, worms that eat the tomato plant have toxins in their body that will kill your animals.
Are they healthy for my animal?
They are extremely healthy. They are high in calcium, low in fat, low in chitin and have an extremely soft exoskeleton so your animal will not have trouble digesting them. All this provides more usable nutrition for your animals. Calcium - 46.4mg/100g. Fat - 3.07%.