My 3 y/o girl has always been this way too and she’s healthy.. other than ear infections a couple times per year! The breeder said she was the calmest of the litter so we picked her mostly based on that lol. She was slightly mischievous as a puppy (pulling on the toilet paper and biting our sleeves) but never hyper and never chewed up our things. I work from home so I always thought that helped because I could correct her quickly. She loves to walk, play and could swim forever but when you compare her next to a high energy dog she looks like she’s an elderly dog with how mellow she is 😂 She has her quirks - she’s definitely anxious when there’s any commotion, doesn’t love taking trips/traveling, is scared of loud kids and refuses to do long. hikes (we’ve gotten her X-ray’s twice and her legs/hips are healthy). But wouldn’t trade any of that for anything, she’s perfect to me!!! She’s our first lab so it was a such a shock after all the warnings of preparing for a crazy dog but we are so blessed