The optimal time to begin potty training your Labrador is around 3 months old, as their urinary and digestive systems are typically more developed. While a 3-month-old Labrador won't need to relieve themselves as frequently as younger puppies, they still can't hold it for extended periods. Full bladder control usually comes around 5 to 6 months of age.

How to Train Your Labrador Not to Go Potty Indoors
1. Build Trust
Before starting any training, it's crucial to earn your Labrador puppy's trust. A newly adopted puppy can feel disoriented and insecure. Spend time playing with your puppy and building a bond, which will make the training process much easier and more effective.
2. Establish a Designated Potty Area
To prevent your Labrador from going potty all over the house, you should select a specific location for them to relieve themselves. Place some old newspapers in this area and consider using a potty-training spray to encourage them to go there. Once you've chosen the spot, avoid changing it, as this will only confuse your puppy.
3. Positive Reinforcement
When your Labrador successfully eliminates in the designated area, gently pet their head and offer a treat as a reward. This will reinforce the positive behavior and encourage them to repeat it in the future. Consistency is key to effective potty training. Remember, patience and positive reinforcement are the most effective training methods for a Labrador puppy.