Today at the park, my 10 month old, 75 lb Golden Retriever/Vizsla mix was running around normally. After about 20 minutes she came and laid by me in the shade to cool down (which is pretty normal). We got water twice while she was running around because it’s pretty hot in South Miami. After laying down for 10 minutes, we got up to leave and she was wobbly and walked crooked. She could run fine, but just seemed weak (like after you go on a long run and your legs are super tired or after doing heavy leg day at the gym). She is fine now and it lasted about 3 minutes. Is this normal behavior exhibited with overheating? Should I be concerned?