Final answer:
Anaphylaxis in dogs can result in severe allergic reactions that can be life-threatening if left untreated.
Step-by-step explanation:
Anaphylaxis is a severe allergic reaction that can occur in certain individuals. In dogs, signs of anaphylaxis can typically be seen within 20 to 30 minutes if left untreated. It is important for dog owners to seek immediate veterinary care if they suspect their dog is experiencing anaphylaxis, as it can be life-threatening.