Dog — exercise & enrichment (regular exercise prevents behavior problems; brachycephalic caution; don't overdo)
Source: first-hand Merck Veterinary Manual pet-owner text, saved to source_file; every claim below is a C1 byte-substring of it.
Claims
Dogs need regular exercise to stay healthy and avoid behavior problems.Some breeds with breathing issues, like French Bulldogs or Pugs, may not handle long exercise sessions well but can still benefit from shorter walks.Owners should be careful not to overdo it, especially in hot or humid weather.How Much Exercise Will My Dog Need? Dogs need regular exercise to stay healthy and avoid behavior problems.Dogs that get enough exercise are generally healthier and happier.However, too much exercise can be harmful, especially for out-of-shape, very young, or very old dogs.Puppies, who love to chew, are especially at risk for ingesting these toxic substances.Try to tie up electrical cords out of reach of puppies to prevent chewing.You can also use bitter-tasting sprays (like bitter apple) on electrical cords to discourage chewing.
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Source: pdf-raw/companion-care/dog_providing_home.txt · https://www.merckvetmanual.com/dog-owners/selecting-and-providing-a-home-for-a-dog