The love for animals is a natural love for human beings. Children feel it and human beings express it in one of the noblest service projects: Animal Sanctuaries.
Shrii Prabhat Sarkar expressed the need 
“But animals should only be killed when they directly endanger human life. It follows from this that you should not kill animals in their natural habitat. In the forests there are many lions, tigers, snakes, etc., but such creatures should not be killed in their natural environment because there they pose no threat to human life. Although it is the nature of some tigers to attack human beings, all tigers should not be killed simply for this reason. We must not forget that it is also the duty of human beings to build sanctuaries for dying animals and endangered species of animals and plants. This is the practical approach of the living philosophy of Neohumanism. This is the approach of Neohumanism to animal and plant life.” (Prout and Neohumanism)
“Pisciculture should also be developed in ponds and lakes. The fish help to keep the water clean and the level constant because their breathing creates water and carbon dioxide. The fish inhale oxygen along with water 
“Besides these common points, there are some special features of Master Units which should also be implemented:…11.A sanctuary.”BABA
“KánanaKan/kán + lyut́ with elongated vowel gives us the word kánana. Etymologically it means something that shines or that is worth seeing. The first 
See here some sites and articles dedicated to animal sanctuaries:
Why Animal Sanctuaries are needed

