"Better bladder" refers to having a healthier and stronger bladder, which allows a person to control their urine better and reduces problems like frequent urination or leakage. Full definition
Each child matures and develops good bladder control at a different pace. (aboutkidshealth.ca)
Once your puppy has attained better bladder and bowel control, you should skip the dog litter box and encourage potty breaks outdoors and on walks. (puppy-training-solutions.com)
Need some trainers until he gets better bladder control. (latchedonmom.com)