Yes, it is possible for pets to grieve the loss of their companion. Pets can form strong emotional bonds with each other, and the loss of one can affect the other.  It’s not uncommon for pets to display signs of mourning, and these may include vocalization, pacing, change in appetite and energy levels, seeking attention, or having elimination issues. However, the degree to which they grieve can vary based on the individual animal and their relationship with the pet that passed away.  Providing extra love, attention, and support to your remaining pets during this time can help them cope with the loss. Consider distracting your pet with walks, puzzle toys, or using calming collars or sprays.