Cons:
Typically it has no major cons still Overdose of CBD OIL can suffer dog from various physical symptoms
Dogs might show signs of transient GI side effects,
Most often soft diarrhea; and mild sleepiness during initial loading dose, particularly in smaller dogs
CBD oil can cause them to become lethargic and depressed.
Your dog might also vomit, and become easily agitated due to too much CBD oil.
Learn here Dosage of CBD for Pets.