Runs in 800 lb steers

[Sampson]

5 - 800 lb steers (12months) that were overfed grain by helping neighbor, now have squirts.
Dark brown color, no smell, just runny, these calves were vaccinated.
Still drinking and eating coastal hay.
What can they be given to help firm up? Would like to try natural solutions first.
Thinking psyllium husk or beet pulp?

Thanks