Although Seth had set up his own little garden of special herbs, such as the euphorically addictive golden grass with healing properties, it was a relatively small garden. When it came to the actual farming of their city, that had been a result of his most wondrous power of delegation.
Whether by utter coincidence or the fate of the gods, he happened to have his expert with them on this trip, so they were able to fulfil at least some of their obligation to the beast kingdom before they left.
They could have promised to come back and do it later, but there was no guarantee their protection would still stand as the beasts might have felt scammed by the whole idea. Of course, there was no real guarantee it would last anyways, but it was better to cover all bases and just be cautious nonetheless.
At least if it failed now, they would know it was down to betrayal rather than a sense of irritation at being scammed.
