I just googled "average horse lifespan", and the answer that came back was, exactly, "25-30 years". There's a clue in that number for you.
The working life of a horse may be shorter than the realistic lifespan. Searching for "horse depreciation" gives 7 years for a horse under age 12, the prime years for a horse being between 7 and 12 yrs old, depending on what it is used for.
I'm willing to accept the input of someone more knowledgeable about working horses, though!
The company is virtue signaling, pandering, and you're falling for it. Jesus Christ.