Here are the MSDS for both of them.
http://www.pbigordon.com/pdfs/MSMAHerbicide-MSDS.pdf and
http://msdssearch.dow.com/PublishedLiteratureDAS/dh_0060/0901b8038006067f.pdf
As long as they are acting OK, (eyes seem to be a problem) and didn't get into much of it, hopefully they will be OK.
2,4-D
Eye contact:
Very irritating to eyes.
Skin contact:
Not irritating to skin.
Ingestion:
Harmful if large amounts are swallowed.
Inhalation:
Moderately irritating to respiratory tract
MSMA Health Hazards (Acute and Chronic):
EYES: Contact may cause irritation and burning.
SKIN: Moderately irritating to the skin; may be absorbed through the skin.
INHALATION: Moderately irritating to the mucous membranes.
Inhalation of sprays may cause burning sensations in the respiratory
tract, resulting in coughing.
INGESTION: May cause vomiting, with pain in the chest and abdomen,
and diarrhea.
CHRONIC EFFECTS: Repeated or prolonged overexposure may effect
the liver and kidneys.