Animals that are not faithful as pets

 1.  Turtles   - - - -  They have a long life span but are not usually loving.

2.   Lizards  - - -  They are more interested in survival than loyalty..

3.   Fish  - - - -   Their interaction is only at the time of feeding.

4.   Hermit crabs  - - - They are sociable among themselves only.

5.   Snakes  - - -   Their interaction is driven by instincts.