Abstract
The average life expectancy of pets in Japan is prolonged annually, and it is recognized that increased age tends to decrease physical activity. In this study, we examined the effects of the administration of proteoglycan (PG) extracted from salmon heads on senior dogs. The activity and floor reaction force of seven older dogs ( 8 -15 years old) were measured both before and after PG administration. The results showed that the activity increased by 6.8% to 45.9% in three out of four dogs. Furthermore, the floor reaction force increased in all limbs in one animal, three limbs in three animals, and two limbs in one animal, with increases ranging from +0.06% to +15.91%. The amount of activity also increased in all limbs. One owner reported that their dog spent more time playing at home after PG administration. In addition, the palatability of the administered PG was good, and no problematic events were observed in any of the dogs. This study utilized a Plus Cycle activity meter, which makes it easier to assess the condition of the animal when administering supplements such as PG. It can also be used as a tool for communication between veterinary nurses and owners.
