Unconditional love is known as affection without any limitations and love without conditions. This love is the type of love which has no bounds and is unchanging.
Psychologically, unconditional love refers to conscious and unconscious states of mind in which one has the goal of increasing the welfare of another, despite any evidence of benefit for oneself.
Your dog’s unconditional love is quite beneficial to both of you: Touching your dog releases oxytocin, serotonin and prolactin in the brain, improving mood, reducing pain and lowering cortisol (a chemical associated with stress).
Senior dogs are grateful for the second chance at life you’ve given them.