Pour the beef broth into a medium saucepan and bring it to a gentle boil over medium heat.

Slowly sprinkle in the agar-agar powder while whisking constantly until completely dissolved and smooth.

Reduce the heat to low and add the pureed pumpkin, stirring until fully blended and evenly colored.

Stir in the shredded carrots and salt, mixing until the carrots are evenly distributed.

Simmer the mixture gently for 20 minutes, stirring every few minutes to prevent sticking.

Remove the pan from the heat and let the mixture cool for 5 to 10 minutes until warm but not hot.

Place silicone bone molds on a tray, then carefully pour or ladle the mixture into each mold cavity.

Tap the tray gently on the counter to release any air bubbles from the filled molds.

Transfer the tray with molds to the refrigerator and chill for about 1 hour, or until the treats are set and firm.

Pop the bone treats out of the molds and store them in an airtight container in the refrigerator until serving.