I recently removed two ticks from my dog.
What are their effects on dogs healths? I heard about tick poisoning.
Apart from these direct effects, do they transmit other diseases?
Oh yes, ticks are quite an issue for dogs. Some diseases that may be transmitted by ticks include:
Many of these associated issues may also effect humans if the ticks transfer from the dog to the human. So, be very wary of that and be vigilant in keeping your dog tick free.
More localized effects is that the tick can leave a small pimple-like mound that should go away in a day or two. Might be a little itchy. If it doesn't go away in a couple of days, take the dog to the vet. After tick removal, watch your dog carefully for signs of illness (e.g. not eating, vomiting, etc.).