Black scabs at the urethral opening of kittens may be caused by trauma scabs, urinary tract infection, urethral obstruction, etc. The cat needs to be sent to the pet hospital for examination in time to avoid aggravation of the condition. Pay attention to your cat's hygiene and clean up any foreign objects promptly to avoid infection. It is best for young cats to use tofu litter. Tofu litter is cleaner and more hygienic. The particles are relatively large and will not block the cat's urethra. Moreover, the cat litter must be cleaned in time to keep the cat's litter box clean and hygienic.