TREE SQUIRREL RESCUE · DAY 1 TO RELEASE

05 — Infant Development: Eyes Open to ~6 Weeks

How to continue formula safely while introducing the first solids, climbing, nest use and independent elimination.

AT A GLANCEDo these things before moving on
ESCAPE-PROOFUpgrade housing before climbing, digging or gliding makes the old container unsafe

Upgrade housing before climbing, digging or gliding makes the old container unsafe.

FORMULA + SOLIDSEyes open does not automatically mean weaned

Eyes open does not automatically mean weaned.

WILD SKILLSAdd natural movement, hiding, foraging and species-normal behavior

Add natural movement, hiding, foraging and species-normal behavior.

VISUAL GUIDE

See the important points for this stage

Eyes opening / mobile stage
ESCAPE-PROOFEyes opening / mobile stageUpgrade housing before climbing, digging or gliding makes the old container unsafe.Wildlife Center of Virginia · VIEW SOURCE ↗
Douglas’s Squirrel
FORMULA + SOLIDSDouglas’s SquirrelEyes open does not automatically mean weaned.© song_dog, some rights reserved (CC BY-NC) · CC-BY-NC · VIEW SOURCE ↗
Southwestern Red Squirrel
WILD SKILLSSouthwestern Red SquirrelAdd natural movement, hiding, foraging and species-normal behavior.© Terry Lee Crane, some rights reserved (CC BY-NC) · CC-BY-NC · VIEW SOURCE ↗
Fox Squirrel
LESS HANDLINGFox SquirrelReduce unnecessary human contact as independence develops.© Tobin Brown, some rights reserved (CC BY-NC) · CC-BY-NC · VIEW SOURCE ↗

Eyes open does not mean weaned

At roughly five to six weeks the baby becomes much more mobile, but formula is still the nutritional foundation. The goal now is to maintain steady growth while adding safe climbing, a nest site and the first solid foods.

Continue formula and daily weight tracking

  • Continue the 5–7% weight-based volume framework if the baby is tolerating it and gaining normally.
  • Keep formula very warm and continue careful syringe technique.
  • Do not reduce formula simply because the eyes are open or the baby starts chewing.
  • Weigh at the same time each day and look for a steady trend rather than one “perfect” number.

Around 6 weeks — introduce solids in the correct order

  1. 01
    First solid: a nutritionally complete squirrel/rodent block. Henry’s Blocks are one source-specific option; the important point is introducing a balanced block before nuts, fruit or treats.
  2. 02
    Offer a fresh small piece daily; young squirrels may shred or play with it before actually eating much.
  3. 03
    Once chewing well, introduce healthy vegetables and safe wild browse. Remove seeds, pits, skins or strings that create choking risk.
  4. 04
    Add clean fresh water in a secure bottle or shallow bowl.
  5. 05
    Do not start with nuts, fruit or treats. Those foods can teach the baby to reject the balanced foods it needs.

Housing progression

As coordination improves, move from the neonatal tub into a secure juvenile enclosure with low-risk branches and an elevated nest box/cube. Increase climbing complexity gradually so a weak or clumsy baby does not have a long fall path.

VISUAL REFERENCE

Visual: how quickly the baby changes

A four-week-old and an older juvenile need very different containment. Compare the fur, eyes, tail development and mobility before changing housing.

About eight weeks
About eight weeksCredit: Wildlife Center of Virginia.

Elimination transition

Most babies begin eliminating independently around this developmental window, but do not stop stimulation simply because the eyes opened. Stop only when you are consistently seeing normal independent urination/defecation.

Reduce imprinting while still providing care

Keep handling functional rather than social. A releasable juvenile should learn that food, climbing, nest-building and squirrel behaviors are more important than seeking human attention.

Sources